Trouble with installation of systemTap on linux-image-3.19.0-25-generic

[FOPA Leon constantin]

Hi,

After successfully install systemtap3.0 (./configure; make; make 
install)
on a linux-image-3.19.0.25-generic (with its debug kernel image), I try 
to test if everything gone fine. However running the following 
helo-world command neither return and error nor the expected result

sudo stap -e 'probe kernel.function("sys_open") {log("hello world") 
exit()}'

Instead, It return a warning

WARNING: probe 
kernel.function("SyS_open@/build/linux-OdodyZ/linux-3.19.0/fs/open.c:1028") 
(address 0xffffffff811f3e80) registration error (rc -84)

I Can not tell if everything is fine or not, since I was expected the 
"Hello world" message, which never appear.

What is happening here and Is there a way out from this ?

Best regards,